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molybdenum ion
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  钼离子
     In order to study the effect of molybdenum ion implantation on the aqueous corrosion behavior of zirconium, specimens were implanted by molybdenum ions with a dose range from 1×1016 to 5×1017 ions/cm2 at maximum 160℃, using MEVVA source at an extracted voltage of 40 kV. The valence of the surface layer was analyzed by X-ray photoemission spectroscopy (XPS);
     使用MEVVA源对纯锆表面注入1×1016 ions/cm2至5×1017 ions/cm2剂量的钼离子,研究离子注入后其在水溶液中耐蚀性; 注入时的最高温度为160℃,加速电压为40 kV。
短句来源
     Effect of Molybdenum Ion Doping on the Photo-Catalytic Properties of TiO_2 Film
     钼离子掺杂对TiO_2薄膜光催化性能的影响
短句来源
     Influence of Molybdenum Ion Implantation on the Aqueous Corrosion Behavior of Zirconium
     钼离子注入对纯锆耐蚀性的影响
短句来源
     XPS is used here to study the bimetallic,ion pair complexes [Mo(dtc) 4][Ln(dtc) 4] (Ln=La-Er, exp.Pm) . It was shown that lanthanide ions of +3 valence and molybdenum ion of +5 valence exist in the complexes while the ligand dtc is bidentate to coordinate with the center ions.
     通过X光电子能谱法对双金属离子对配合物[Mo(dtc)4][Ln(dtc)4](Ln=La-Er,除Pm外)进行了研究,结果表明:在该离子对配合物中,存在+3价的镧系离子和+5价的钼离子,配体dtc是以双齿螯合的方式分别与中心离子配位的。
短句来源
     In order to study the effect of molybdenum ion implantation on the aqueous corrosion behavior of zircaloy-4, specimens were implanted by molybdenum ions with a fluence range of 1×1016—1×1017 cm-2. The valence of the surface layer was analyzed by X-ray photoelectron spectroscopy (XPS) and the three-sweep potentiodynamic polarization measurement was employed to evaluate the aqueous corrosion resistance of zirconium in 1 mol·L–1 H2SO4 solution.
     观察钼离子注入对锆-4合金在硫酸水溶液中耐腐蚀性的影响。 使用MEVVA(Metalvaporvacuumarc)源对锆-4合金表面注入1×1016—1×1017cm-2剂量的钼离子,用X射线光电子能谱(XPS)分析其表面元素价态;
短句来源
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  “molybdenum ion”译为未确定词的双语例句
     SYNTHESIS AND APPLICATION OF THE TUNGSTEN AND MOLYBDENUM ION EXCHANGERS
     钨钼无机离子交换剂的合成与应用
短句来源
     The Treatment of Wastewater Containing Molybdenum Ion by Ion Exchange
     离子交换法在治理含钼废水中的应用
短句来源
     whereas revision of previous models with regard to the micro-environments of each molybdenum ion and the nature of the triuncJear active-center (whether it is 2Mo-1Fe, or 1Mo-2Fe) have been made by reference to recent progresses on nitrogenase research reported by many laboratories.
     至于钼离子的价态和周围微环境,以及三核究竟是两钼一铁还是一钼两铁,则是参考最近国际上关于固氮酶的科学实验新成就而作出相应的修正和演进的。
短句来源
     Abstract: The review described the principle of the process and the influencing factors in treating wastewater containing molybdenum ion by ion exchangers.
     本文综合介绍了离子交换法治理含钼废水的机理、影响因素。 并列举了D380、SW305、D290、W—305C、304A等大孔离子交换树脂处理含钼废水的工艺流程和参数。
短句来源
     Direct fluorophotometric determination of trace phosphorus is based upon the quenching of the fluorescence of rhodamine 6G due to the formation of a nonfluorescent hetero_polynuclear acid of rhodamine_phosphoro_molybdenum ion associates. The excitation wavelength is 350 nm,while the maximum emission wavelength is 555 nm. The flow_injection fluorophotometric variant of this method has the advantages of high sensitivity,good selectivity and simplicity.
     建立了利用罗丹明6G-磷钼杂多酸离子缔合物测定微量磷的直接荧光法和流动注射荧光法,最大激发光波长350nm,最大发射光波长555nm,流动注射荧光法保持直接荧光法灵敏度高、选择性好的优点,同时使测定更加简便、快速,用于测定铜合金、钢样、锰矿中微量磷获得满意结果。
短句来源
  相似匹配句对
     Ion Exehange Proeess m Molybdenum Metallaygy
     离子交换技术在钼冶金中的应用
短句来源
     Remove of Molybdenum from Tungsten Solution by Ion Exchange
     用离子交换法从钨溶液中分离钼
短句来源
     ION BEEN OXIDATION
     离子束氧化
短句来源
     BRAZING OF MOLYBDENUM
     钼的钎焊
短句来源
     Climax Molybdenum
     美国克莱马克斯钼公司
短句来源
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  molybdenum ion
In complexes (2-4) the terminal Mo=S bonds of the MoS42- unit become hydroxylated and the molybdenum ion is reduced from the starting MoVI in MoS42- to MoIV in the final product (2-4).
      
Effect of molybdenum ion coordination on acrolein adsorption on α- and β-cobalt molybdate
      
In complexes (2a-2e) the terminal Mo=S bonds of the MoS unit get hydroxylated and the molybdenum ion is reduced from the starting MoVI in MoS to MoIV in the final product.
      
X-ray data of single crystals prepared from EPR-active samples show in both inhibited forms that the arsenic atom interacts with the molybdenum ion through an oxygen atom at the catalytic labile site and that the sulfido ligand is no longer present.
      
The solid-state structure reveals that the molybdenum ion sits within a cleft formed by the biphenyl backbone of the ligands, providing some steric protection.
      
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A twin-sited-dicubane-type-cluster structural model of nitrogenase active-center, [S*Fe3S2*(L)]Mo[(L')S2*Fe3S*], has been proposed, L and L' being two labile ligands, such as N2, NH3, H, or H2O. This model is a logical evolution of the twin-sited-monocubane-type-clunter structural model, Fe2S2*Mo2O2, and the twin-sited-tricubane-type-cluster structural model, Fe2S2*(L)(L')Mo2[S3*Fe3S*]2, previously proposed by us. The twin-sited-cubane-type-duster structural feature common to all the three models and the end-on-plus-double-side-on...

A twin-sited-dicubane-type-cluster structural model of nitrogenase active-center, [S*Fe3S2*(L)]Mo[(L')S2*Fe3S*], has been proposed, L and L' being two labile ligands, such as N2, NH3, H, or H2O. This model is a logical evolution of the twin-sited-monocubane-type-clunter structural model, Fe2S2*Mo2O2, and the twin-sited-tricubane-type-cluster structural model, Fe2S2*(L)(L')Mo2[S3*Fe3S*]2, previously proposed by us. The twin-sited-cubane-type-duster structural feature common to all the three models and the end-on-plus-double-side-on coordination activation of N2, α-acetylenes, alkyl cyanides and isocyanides on the trinuclear active-center have been inferred mainly from the known reactions of nitrogenase with the various types of substrates and CO inhibitor regarded as chemical probes, and from the principles of coordination catalysis; whereas revision of previous models with regard to the micro-environments of each molybdenum ion and the nature of the triuncJear active-center (whether it is 2Mo-1Fe, or 1Mo-2Fe) have been made by reference to recent progresses on nitrogenase research reported by many laboratories. The twin-sited-dicubane-type-cluster structural model (with 1 MOIII(Iv)) is in accord with the EPR and Moessbauer spectra of nitrogenase and FeMo-co recently obtained and interpreted by Orme-Johnson and Munck. It also gives better mechanistic explanations for the enzyme-catalyzed reactions of all the known nitrogenase substrates and the characteristic behavior of CO as a selective inhibitor o?nitrogenase. A brief, further discussion of the mechanism of ATP-driven electron and proton, transports is also given.

本文提出固氮酶活性中心的骈联双座双立方烷原子簇结构的活性中心模型,[S~*Fe_3S_2~*(L)]Mo[(L’)S_2~*Fe_3S~*],其中L和L’代表两个可以移开的配位体,如N_2,-H,或-NH_3。这个模型是前阶段先后提出的骈联双座单立方烷原子簇结构模型,Fe_2S_2~*·Mo_2O_2,和骈联双座三立方烷原子簇结构模型,Fe_2S_c~*(L)(L’)Mo_2[S_3~*Fe_3S~*]_2,的又一次演进。这三个模型所共有的骈联双座原子簇结构特征和三核络合固氮方式,主要都是以固氮酶己知反应的十来种底物和抑制剂CO作为化学探针并应用络合催化原理而推断出来的。至于钼离子的价态和周围微环境,以及三核究竟是两钼一铁还是一钼两铁,则是参考最近国际上关于固氮酶的科学实验新成就而作出相应的修正和演进的。骈联双座双立方烷原子簇结构(含单钼)比较符合Orme-Johson和Munck等的顺磁共振和穆斯鲍尔谱实验结果,能说明比较多的实验事实。本文还扼要地讨论了固氮酶反应中ATP驱动的电子和质子传递机理。

In the presence of polyvinylalcohol molybdenum ions(Ⅵ) can form a colour product with both bromopyrogallol red and ethyl violet. Owing to the increasing of the effective absorption section area of chromogenic molecules, the reaction sensitivity is enhanced remarkably. This paper describes the experimental conditions of above mentioned synergistic chromophoric reaction, composition of complex formed and related reaction mechanism, and a procedure for the spectroph-otometric determination of trace molybdenum....

In the presence of polyvinylalcohol molybdenum ions(Ⅵ) can form a colour product with both bromopyrogallol red and ethyl violet. Owing to the increasing of the effective absorption section area of chromogenic molecules, the reaction sensitivity is enhanced remarkably. This paper describes the experimental conditions of above mentioned synergistic chromophoric reaction, composition of complex formed and related reaction mechanism, and a procedure for the spectroph-otometric determination of trace molybdenum. In an acetic acid medium molybdenum ions form an ion-associate complex with a definite composition of Mo:BPR:EV = 1:1:2, with both Bromopyrogallol red and ethyl violet, and its corresponding molecular form is [EV]2 [MoO2(BPR)]. The maximum absorption of molybdenum complex was located at 535 nm, in the meantime the reagents (BPR + EV) exhibited maximum absorption at 640 nm. The apparent molar absorptivity of the complex is ε535 = 1.70×105 L·mol-1. cm-1. If the dual peak-dual wavelength method is used for the determination, the sensitivity of the method will be doubled., Δε535-640= 3.20×105 L·mol-1·cm-1. Beer's law is obeyed for the molybdenum concentration 0-0.16μg/mL. The Sandell's sensitivity is 0.00057μg/cm2. Reaction is highly selective. The common metal ions do not interfere with molybdenum reaction except germanium, titanium and tungsten ions

本文研究了在聚乙烯醇存在下,钼(Ⅵ)与溴邻苯三酚红和碱性染料-乙基紫产生的协同显色反应。探讨了利用协同显色反应进行分光光度测定痕量钼的可能性。在乙酸介质中,钼(Ⅵ)与溴邻苯三酚红和乙基紫形成[EV]_3[MoO_2(BPR)]离子缔合型配合物,其吸收峰位于535nm,相应试剂(BPR+EV)的吸收峰则位于640nm。摩尔吸光系数e_(536)=1.70×10~5L·mol~(-1)·cm~(-1)。双峰双波长法可使灵敏度倍增。Δε_(535~640)=3.20×10~5L·mol~(-1)。钼含量为0~0.16~μg/mL时,吸光度遵守比尔定律。桑德尔灵敏度(S)为0.00057μg/cm~2。反应具有较高的选择性,除锗、钛、钨、钒有较严重干扰以外,其它常见金属离子不干扰钼的显色。根据配合物的组成,推测了它的可能结构。

The catalytic behaviour of 2:18 heteropolymolybdophosphoric acid and its salts(Dawson structure) in the decomposition of H_2O_2 has been studied in comparison with that of 1:12 heteropolymolybdophosphoric acid and its salts (Kcggin structure). The results show that H_6(P_2Mo_(18)O_(62), so as Ha(PMo_(12)O_(40) does not posses catalytic activity for H_2O_2 decomPosition, whereas their Fe~(3+), Cu~(2+) salts are more active and their kinetic behaviour toward H_2O_2 decomposition is different from that of 1:12...

The catalytic behaviour of 2:18 heteropolymolybdophosphoric acid and its salts(Dawson structure) in the decomposition of H_2O_2 has been studied in comparison with that of 1:12 heteropolymolybdophosphoric acid and its salts (Kcggin structure). The results show that H_6(P_2Mo_(18)O_(62), so as Ha(PMo_(12)O_(40) does not posses catalytic activity for H_2O_2 decomPosition, whereas their Fe~(3+), Cu~(2+) salts are more active and their kinetic behaviour toward H_2O_2 decomposition is different from that of 1:12 heteropolymolybdophosphate in that it obeys the second order equation. It is related to the environmental difference of the countercation in these two structures. The catalytic behaviour remains unchanged, when part of molybdenum ions in 2:18 heteropolymolybdophosphorie acid is substituted by vanadium ions. It indicates that the substtituted vanadium ions are not only the active species, but have the same environment in these two structures.

研究了2:18磷钼杂多酸(盐)(Dawson结构)对H_2O_2分解反应的催化行为。实验结果表明,H_6(P_2Mo_(18)O_(62))和1:12磷钼杂多酸H_3(PMo_(12)O_(40))相同,对H_2O_2分解无活性,而其盐类(Fe~(3+)、Cu~(2+))则有很好的催化活性,但对H_2O_2分解的动力学行为不同于1:12磷钼杂多酸盐,符合二级动力学反应关系式。这可能和这两种结构中抗衡阳离子所处环境不同有关。杂多酸阴离子中引入V,部份取代钼后所得实验结果与1:12磷钼钒杂多酸完全相同,表明引入的钒离子在两种结构中不仅有相同的环境而且是催化剂的活性种。

 
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